runtime/GCActivityCallbackBlackBerry.cpp

   1 /*
   2  * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include "config.h"
  20 #include "GCActivityCallback.h"
  21
  22 #include "Heap.h"
  23 #include "VM.h"
  24 #include <BlackBerryPlatformMemory.h>
  25
  26 namespace JSC {
  27
  28 DefaultGCActivityCallback::DefaultGCActivityCallback(Heap* heap)
  29     : GCActivityCallback(heap->vm())
  30 {
  31 }
  32
  33 void DefaultGCActivityCallback::doWork()
  34 {
  35     JSLockHolder lock(m_vm);
  36     m_vm->heap.collect(Heap::DoNotSweep);
  37 }
  38
  39 void DefaultGCActivityCallback::didAllocate(size_t)
  40 {
  41     if (m_timer.started())
  42         return;
  43
  44     // Try using ~5% CPU time.
  45     m_timer.start(m_vm->heap.lastGCLength() * 20);
  46 }
  47
  48 void DefaultGCActivityCallback::willCollect()
  49 {
  50     cancel();
  51 }
  52
  53 void DefaultGCActivityCallback::cancel()
  54 {
  55     m_timer.stop();
  56 }
  57
  58 }